Class L

In planetary classification, some barely habitable planets and moons are classified as Class L. Odo and Quark crash-landed on a Class L planet after Odo was traveling with Quark to meet a Federation Grand Jury. (DS9: "The Ascent")

A Class L planet has an oxygen/argon atmosphere. (VOY: "The 37's")

An example of a Class L planet is Indri VIII. (TNG: "The Chase")

Skalaar and Jonathan Archer landed on a Class L planet to escape Kago-Darr. They later landed on it to conduct repairs to Skalaar's Tellarite shuttle. (ENT: "Bounty")

The USS Olympia crashed on a Class L planet in the Rutharian sector in 2371. (DS9: "The Sound of Her Voice")

B'Elanna Torres crash landed the Delta Flyer on a Class L planet and were stranded there for several days but Harry Kim finally showed up with the part she needed to contact USS Voyager again. This planet appeared somewhat atypical of a Class L planet as it contained at least one region of that supported lush vegetation and even a pre-warp civilization known as Kelis' species. It also produced rain and contained several landmasses and oceans or seas. Little was seen of the planet's surface, so perhaps the remainder of the planet was far less hospitable and more standard for an Class L planet. (VOY: "Muse")

In an alternate timeline, the USS Voyager crash-landed on a Class L planet near the border of the Alpha Quadrant. (VOY: "Timeless")

A Class L planet was found by the Hierarchy as a settlement site for the crew of the USS Voyager after their warp core would be confiscated. (VOY: "Renaissance Man")